Feed-regulator for powdered material.



D. M. PIGKETT. EEED REGULATOR EOE EOWDEEED MATERIAL.

APPLIOATION FILED JULY 23, 1906.

Patented Mar. 9, 1909.

En. i-

@TNESSFS UNITED sTATEs PATENT oEEioE.

DAVID M. PICKETT, OF DETROIT, MICHIGAN, ASSIGNOR, BY

ASSIGNMENTS, OF THREE-FOURTHS TO CHARLES F. BURTON, OF DETROIT MICHIGAN.

DIRECT AND MEsNE FEED-REGULATOR FOR POWDERED MATERIAL.

Specification of Letters Patent.y

Patented March 9,1909.

To all 'whom it may concern:

Be itj known that I, DAVID M. PICKETT, a citizen of the United States, residing at'Detroit, Acounty of Wayne, State of Michigan, haveinvented a certain new andusefui Imrovement in Feed-Regulators for Powdered iIaterial, and declare the following to be a full, clear, and exact descri tion of the same, such as will enable others s'lgilled in the art to which it pertains to make and use the same, reference being had to the accompanying drawings, which forma part of this specification.

This invention relates to feed regulators for powdered material, especially feed regulators for the materials of concrete it has for its object an improved regulator ada ted vto proportion and mix the. material o which concrete is made.

In the drawings :,-Figure 1is an elevation. Fig. 2, is a sectional elevation. Fig. 3, is a section at the line 3 3.' Fi 4, is a section at the line 4 4. Fig. 5, s ows the inner conduit with a sleeve inserted therein. Fig. 6, shows the inner yconduit with a diferent pitch from that shown inFig. 2.

A cylindrical body part. 1, supported by brackets 2, that rests on suitable frame timbers 5, supports directly a hopper 6, in which` sand is thrown, or sand and gravel are thrown. At the top of the cylindrical body 1, inside the hopper, rise struts 7 that Ysupport asecond hopper 8, in which the `cement part of the concrete is thrown.

The main or bod part 1, constitutes the outlet conduit for t e hopper 6; within this outlet conduit and space rom it is a second conduit which constitutes the outlet for the hopper 8. The inner conduit is supported from a Wheel `1() on a vertical shaft 11, which revolves in bearings, of which the lower bearing 12 is carried at the center of a spider supported at the lower end of a hanging case 13 which is secured to the lowerend of said casing 1. The u per end of the shaft 1 1 which carries mixing bllades revolves in bearings through a spider 14 that s ans the upper end of the mixer case 13. he conduit 9 is supported l by struts 15, which are spaced to furnish an outlet to the conduit which discharges through the openings between the struts and 1 also through openings between spokes on the Wheel 10. The conduit 9 carries on its outer screw of surface a screw that revolves in/the'chamber between the conduit 9 and the conduit 1.

From the ,center of the wheel 10 rises a screw shaft 18, that carries the screw 17' proportioned to force through their respective conduits the material fromthe hoppers 6 and 8, in some definite-proportion, and these proportions may be changed by changing the rate of feed of either the outer conduit or the inner conduit. The inner conduit may be more readily and easily changed than the outer conduit, and this may be done by replacing the screw l 17 with another screw, either of dierent pitch (as screw 17*L shown in Fig. 6) or a screw 17 b of smaller diameter, and in this latter case, filling in the space left between the screw of smaller diameter and the walls of the conduit 9 with a sleeve 9b, thus decreasing the cross area of the conduit to correspond with the decreased cross area of the screw.

The upper end of the conduit 9 engages in a groove 20 made in the casting 21, at the mouth of the hop er 8; this furnishes a steady bearing for t 1e upper end of the conduit, the Walls of the groove form a housing over the end of the conduit and kee it ractically clear or clean of dust and irt.

he wheel 10 is furnished on its lower side with a .cup-like hub 22 that engages over a hub-like vpro'ection Aon the spi er 14, and the lower en `of the shaft 12 is also provided with a cup shaped housing 23, that engages over a hub-like rojection 24 on the lower spider 25( ,The anging shaft 11 is provided with a number of projecting arms extending from a hub 25, which serves to mix the material in its passage through the hanging case 13. The revolving parts of the mixer are driven by a main driving shaft 26 provided with a miter pinion 27 that meshes with miter gear 28, on the wheel '10. The

hanging case 31 hangs from the case 1, by means of yoke arms 28.

1. In a feed regulator for powdered materials, the combination of a plurality of hoppers, av conduit for each hopper, the sevto contain materials to be mixed, con uits from said hoppers in concentric arrangement, a rotatable feed regulating device in each of said conduits, a wheel 'supporting said feedl devices and pi ovided with openings through which the material may fall, substantially 'as described.

3. In combination with 'a plurality of hoppers, anv outlet from each hop er, a screw conveyer engaging in each out et, the said outlets being arranged one within another whereby there Ais formed a central outlet passage from one of said hoppers, and an .annular outlet passage from another of said hoppers with a screw conveyer engaging in said central passage, 'and a hollow screw engaging in sai annular passage, substantially as described.

Il. In combination with a plurality of hoppers, an outlet from each hopper, the outlet from one of said hoppers being located within the outlet from another of said hoppers,

whereby there is formed a central passage from the first hopper, and an annular passage from the second hopper', struts supporting the conduit of the first mentioned outlet and forming passages communicating between the central passage and ,the annular passage, substantially as described.

5. n combination with hoppers adapted to contain segre ated masses of material, a conduit leading from each, said hoppers and conduits being coaxially arranged, and having a common point of delivery, a screw feed regulator in each of said conduits, each positively controlling by its extent to the wall of the next adjacent conduit the possible flow of material therethrough, and a unitary rotating deviceon which all of said feed regulators are mounted, substantially as de scribed.

In testimony whereof, I sign this specication in the presence of two witnesses.

DAVID M, PICKE'IT.

Witnesses:

MAY E. KOTT, C. C. JENNINGS. 

